Rate and Time of Boron Application Increase Almond Productivity and Tissue Boron Concentration

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dc.contributor.authorNyomora, Agnes M. S.
dc.contributor.authorBrown, Patrick H.
dc.contributor.authorKrueger, Bill
dc.date.accessioned2016-05-05T13:53:04Z
dc.date.available2016-05-05T13:53:04Z
dc.date.issued1999
dc.description.abstractPrevious studies with tree species have demonstrated that foliar boron (B) promotes flowering, fruit set, and yield. However, for most species the optimum time for foliar B application has not been determined. This investigation was undertaken to study the effects of time and rate of B application on almond [Prunus dulcis (Mill D.A.Webb)] tissue B concentration, fruit set, and yield. Solubor (Na2B8O13.4H2O), a commercial product containing 20.5% B, was applied with a handgun sprayer either in September (3 weeks postharvest), December (dormancy), or February (budbreak) at rates of 0, 0.8, and 1.7 kg·ha–1 B to almond cv. Butte at one site (Parlier, Fresno County, Calif.), and of 0, 0.8, 1.25, 1.7, and 2.1 kg·ha–1 B on the same cultivar in August, September, or February at a second site (Orland, Glenn County, Calif.) using Borosol, a polyboronated commercial product containing 10% B. At site 1, September application was more effective in increasing tissue B concentration, fruit set, and yield than were December or February applications. The optimal rate was 0.8 to 1.7 kg·ha–1 B when applied in September. At site 2, application in 1996 and 1997 increased tissue B concentration almost linearly, especially when applied in August and February. Application at the highest rate (2.1 kg·ha–1 B) in September produced the greatest final fruit set and yield in 1996. February applications increased initial fruit set at both sites but were less effective than September applications in increasing yield. Application of B did not affect any yield variable in 1997. These results suggest that B should be applied immediately postharvest (September) for optimal effect on tissue B concentration, fruit set, and yield in almonden_US
dc.identifier.citationNyomora, A.M., Brown, P.H. and Krueger, B., 1999. Rate and time of boron application increase almond productivity and tissue boron concentration. HortScience, 34(2), pp.242-245.en_US
dc.identifier.urihttp://hdl.handle.net/20.500.11810/1801
dc.language.isoenen_US
dc.subjectFloweringen_US
dc.subjectFertilizationen_US
dc.subjectNut seten_US
dc.subjectPrunus dulcisen_US
dc.titleRate and Time of Boron Application Increase Almond Productivity and Tissue Boron Concentrationen_US
dc.typeJournal Article, Peer Revieweden_US
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